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Newly Updated Circuit Projects:

Very Simple BLDC Motor Driver Circuits using Back EMF

Last Updated on June 30, 2026 by Swagatam 50 Comments

220px Gehäuselüfter

In this post we investigate what’s a BLDC motor and subsequently I have explained regarding the design of a sensorless BLDC motor driver circuit. BLDC CPU Fans Seen those fast moving fans in CPUs, voltage stabilizers, DVD players, and other similar equipment, which work with utmost efficiency, consuming minimum space, current and yet are able […]

Filed Under: Motor Controller Tagged With: BLDC, Circuits, Driver, Motor, Simple, Very

12V LED Backpack Power Supply Circuit

Last Updated on January 18, 2025 by Swagatam 9 Comments

steam2Bpunk

In this article I have explained to make a simple 12v LED backpack power supply circuit for powering a 36watt LED lamp, which includes appropriately wired integrated sockets for enabling the attachment of external devices such as a regulated battery charger, ammeter, voltmeter etc. The idea was requested by Mr.  Kevin Bates Backpack LED Charger/Driver […]

Filed Under: Power Supply Circuits Tagged With: 12V, Backpack, LED, Power, Supply

Wireless Mobile Phone Charger Circuit

Last Updated on December 12, 2024 by Swagatam 323 Comments

cellphonecharger

A wireless mobile phone battery charger is a device that charges a compatible cellphone or mobile phone placed close to it, through high frequency wireless current transfer, without any physical contact. In this post I have explained how to build a wireless cellphone battery charger circuit for facilitating a cordless cellphone charging without employing a […]

Filed Under: Wireless Circuits Tagged With: Charger, Mobile, Phone, Wireless

How Wireless Power Transfer Works

Last Updated on May 20, 2026 by Swagatam 43 Comments

wireless2Bpower2Btransfer 1

Wireless power transfer is a process in which electrical energy is transferred from one system to another system through electromagnetic waves without using wires or any physical contact. In this post I have explained regarding how wireless power transfer works or the transfer of electricity through air without using wires. You might have already come […]

Filed Under: Electronics Theory, Power Supply Circuits Tagged With: Power, Transfer, Wireless, Works

CDI Tester Circuit for Automobiles

Last Updated on May 16, 2026 by Swagatam 49 Comments

SparkGap

The first design below shows a simple workbench setup for testing all types CDI circuits. It uses a capacitive discharge ignition circuit along with a CDI coil to implement the testing procedure. Audio/Video Representation The circuit does not require any separate oscillator, rather the 100Hz from the bridge rectifier itself works like a pulsed trigger […]

Filed Under: Automobile Electronics Tagged With: Automobiles, CDI, Tester

Rotating Beacon LED Simulator Circuit

Last Updated on June 8, 2026 by Swagatam 49 Comments

1 3

In this post I have explained a simple LED flashing beacon circuit which exactly simulates a rotating police beacon light by generating alternating pulses of suddenly rising and fading illumination effect on the connected LED. The idea was requested by Mr. Ankit Agarwal Technical Specifications Can you advice on how to make the following circuit […]

Filed Under: Lamps and Lights Tagged With: Beacon, LED, Rotating, Simulator

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